Phurbas - a Parallel Code for Lagrangian MHD

Colin P. McNally

Email: colin AT colinmcnally dot ca

See the articles Phurbas: An Adaptive, Lagrangian, Meshless, Magnetohydrodynamics Code. I. Algorithm and Phurbas: An Adaptive, Lagrangian, Meshless, Magnetohydrodynamics Code. II. Implementation and Tests. The name Phurbas is plural to denote the parallel nature of the code. A phurba is a trefoil knife or dagger associated with Indian and Tibetan traditions, commonly made of meteoritic iorn. We have a few examples at the American Museum of Natural History. Though we refer to the code as being Lagrangian, it may be more proper to describe it as a co-moving meshless formulation, as the PDEs are solved in the form with co-moving (or total or convective or Lagrangian) derivatives but the spatial density of resolution points is specified independently of the spatial distribution of mass. The main motivation for this work is a long term vision of building global multiphysics models of protoplanetary disks, though the approach is also promising for work such as studies of turbulent reconnection. I have given talks on this at: